Rectifier circuit



Oct. 14, 1930. 1.. J. BUTTOLPH RECTIFIER CIRCUIT Filed Dec. 23, 19260.0. OUTPUT D.C. OUT 1U? 4\ A.O.SUPPLY INVENTOR HIS ATTORNEY PatentedOct. 1 4, 1930 UNITED STATES PATENT OFFICE LEROY J'. BUTTOLPH, O1GRANTWOOD, NEW JERSEY, ASSIGNOR TO GENERAL ELECTRIC VAPOR LAMP COMPANY,OF HOBOKEN, NEW JERSEY, A CORPORATION OF NEW mnsnr REC'IIFIEB CIRCUITApplication fled December 23, 1928. Serial No. 156,802.

The present invention relates to electric circuit connection means forcurrent rectifiers. The invention more particularly relates to circuitsfor rectifiers of the, lass bulb vapor arc type of rectifier in w ichmeans are incorporated for preventing connection of full supply currentto the rectifierwhen the output current circuit is open.

Various other objects and advantages of the invention will be obviousfrom the following particular description of circuits embod ing theinvention or from an inspection of the accompanying drawings; and theinvention also consists in certain new and novel features ofconstruction and combinationof parts hereinafter set forth and claimed.

Y In the accompanying drawings I have shown for purposes of illustrationcircuits embodying the invention, in which Fi 1 is a circuit diagram fora full wave rectification circuit and Fig. 2 is a diagram of a similarcircuit in which several rectifiers are connected in series in each waveside of the circuit.

In Fig. 1 the transformer primary 1 has an input lead 2 and anotherinput lead 4 in series in which is connected resistor 5. Across saidresistor 5 is connected the shunt circuit comprising the lead 6 and theswitch 8 therein. The spring 10 tends to hold said switch 8 open fromthe transformer secondary 12, which is in operative relation to saidprimary 1, lead 14 connects to the anode 16 of the vapor arc rectifier18, and from another point the lead 20 connects to the anode 22 of therectifier 24. The filament cathodes 26 and 28 of rectifiers 18 and 24respectively are heated by suitable sources of current 30 and 32respectively. Said filaments 26 and 28 connect with each other throughthe lead 34 and from that lead through the lead 36 through the solenoid38 to an output main 40. A second output main 42 connects with anintermediate point on said transformer secondary 12. In operativerelation with said solenoid 38 and the core 48 therein is an armature 46mounted on said switch 8. Said armature which is attracted when saidsolenoid 38 is energized, actuates said switch 8 against said spring 10to close said switch.

In Fig. 2 in addition to said rectifiers 18 and 24 and in series witheach in the respective wave side of the circuit are connected additionalvapor arc rectifiers 18, 1 8 and 24, 24'. The other parts andconnections in' the circuits are substantially the same as those abovedescribed in connection with Fi ure 1.

t has been found that gas or vapor arc rectifiers such for example asthose of the tun ar type can when connected toan output loa be operatedwith higher voltages on the in ut mains in multiple wave rectifyingcircults than the rectifiers will stand when there is no load to drawcurrent therefrom. The circuit and apparatus herein described andembodying the present invention permits the use of the rectifiers oncircuits of higher voltage than the tubes will stand when the workcircuit is o ened because when no current is passing t rough the workcircuit or output circuit and solenoid 38 is not energized said spring10 will open the switch 8 and throw said resistance 5 in series with theprimar 1 and thereby cut down the voltage applie to the transformer andto the rectifier. This resistance 5 upon the closin of the work circuitis immediately shunted by the switch 8 because as soon as the workcircuit is closed and current flows therethrough said solenoid 38 isenergized, armature 46 is actuated thereby and the resistance 5 isshunted permittin the application of full voltage to the rectifyingcircuit,

While I have shown and described and have pointed out in the annexedclaims certain novel features of the invention, it will be understoodthat various omissions, substitutions and changes in the forms anddetails of the apparatus illustrated and in its operation ma e made bythose skilled in the art without eparting from the spirit of theinvention.

I claim:

1. In combination in a system of electric distribution, a transformerhaving input 7 leads and output leads, a resistance in series in one ofsaid input leads, a shunt circuit across said resistance including aswitch, a rectifier and a solenoid in series in said out- IUU put leadsmeans tending to hold said switch open, and an armature mounted in oerative relation with said solenoid and sai switch to be moved by saidsolenoid to close said switch when said solenoid is energized.

2. In combination in a system of electric distribution, a transformerhaving input leads and out ut leads a resistance in series in one of saiinput leads, a shunt circuit across said resistance including a switchwhich is normally open, a rectifier and a solenoid in series in saidoutput leads, and an armature mounted in operative relation with saidsolenoid and said switch to be moved b sai solenoid to close said switchwhen sai so enoid is energized.

3. In combination in a system of electric ilistribution, a transformerhaving input eads and out ut leads a resistance 1n series in one of saiinput "leads, a shunt circuit l across said resistance including aswitch, a gas or vapor arc rectifier and a solenoid in series in saidoutput leads, means tending to I hold said switch open, and an armaturemounted in o erative relation with said solenoid and sai switch to bemoved b said solenoid to close said switch when sai solenoid isenergized.

4. In an electrical distribution system in combination with a gas orvapor arc rectifier, a transformer having a secondary ta connected to anelectrode of said rectifier an another tap to a work circuit lead, aconnection from an opposite electrode of said rectifier through asolenoid to another work circuit lead, supply leads connected to saidtransformer havmg a resistance in series in one of them, a shunt circuitacross said resistance, a switch in said shunt circuit hav- 40 ing aspring tending to hold it in the open Y position, an armature inoperative relation tosa'id solenoid and to said switch adapted to closesaid switch when said solenoid is energized.

5. In combination in a system of electric said switch being normallyopen, a rectifier and an electromagnet in series in said output leads,and an armature mounted in operative relation with said' electromagnetand said ti to be moved by said electromagnet to distribution, inputleads and output leads,

across said resistance in cluding a switch,

